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Phoenix [80]
3 years ago
10

What’s the mean oxygen level for hot ponds?

Biology
1 answer:
artcher [175]3 years ago
8 0

Answer:

It contains 2 or 3 ppm of oxygen concentration.

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What letter represents summer where you live?
AURORKA [14]

I live in letter D in summer and letter B in winter.

<h3><u>Explanation:</u></h3>

In the diagram the letter D represents the summer solstice and the letter B represents the winter solstice. But the letter A and C represents the equinoxes that are present in the month of March and September. Here in India the country lies above tropic of Cancer. So the condition here is like the temperate region. So during summer the sun's rays directly fall on the country as well as during winter the country receives oblique sun rays. Thus from the diagram we can see see that the letter B represents the condition of earth when the sun's rays are not directly falling on earth. So it's winter solstice .

In the letter D we can see that the earth is going through the summer solstice because sun's rays are directly falling on the earth. So it's summer at that time.

6 0
3 years ago
Which of the following mutations could lead to constitutive expression of the genes of the lac operon? View Available Hint(s) Wh
Molodets [167]

Options for part A are as follows:

A) A mutation in the operator sequence

B) A mutation in the lac-Z gene

C) A mutation in the lac-Y gene

D) A super repressor mutation

Answer:

The correct answer:

Part a - A mutation in the operator sequence

Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part C. true.

Explanation:

part a:

If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.

part b:

The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part c:

RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.

4 0
3 years ago
Which of the below is not one of the three main body parts of a mollusk? postanal tail mantle visceral mass muscular foot?
Rudiy27
It's the postanal tail
5 0
3 years ago
This is an advantage of which map projection? They are similar to the actual spherical surface of the globe.
lisov135 [29]

Answer:

Azimuthal map projections

Explanation:

The Azimuthal map projections come in a circular shape. They represent the whole world but in a different manner than that of the other map projections. The other map projections tend to have problems with the size of the objects as they get further away from the Equator, but this map projection doesn't have that problem. The Azimuthal map projections actually represent all of the places on Earth with their correct distances from the central point, and they all have their sizes correct proportionally to the scale, thus making an accurate map projection.

8 0
3 years ago
Select an example of an open system.<br> A.) earth<br> B.) the atmosphere<br> C.) the water cycle
Gekata [30.6K]

Answer:

A. THE EARTH

Explanation:

8 0
3 years ago
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